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dc.contributor.authorZhao, Ruopengen_US
dc.contributor.authorChen, J.en_US
dc.contributor.authorChen, Z.en_US
dc.contributor.authorJiang, Xianen_US
dc.contributor.authorFu, Gengtaoen_US
dc.contributor.authorTang, Y.en_US
dc.contributor.authorJin, W.en_US
dc.contributor.authorLee, Jong-Minen_US
dc.contributor.authorHuang, S.en_US
dc.identifier.citationZhao, R., Chen, J., Chen, Z., Jiang, X., Fu, G., Tang, Y., Jin, W., Lee, J. & Huang, S. (2020). Atomically dispersed CoN4/B, N-C nanotubes boost oxygen reduction in rechargeable Zn–air batteries. ACS Applied Energy Materials, 3(5), 4539-4548.
dc.description.abstractMinimizing the particle size of transition metals and constructing heteroatom-co-doped carbon with a high surface area are deemed imperative in maximizing the atomic utilization of carbon-based materials. Herein, the atomically dispersed Co sites anchored on interconnected B, N-doped carbon nanotubes (B, N, Co/C nanotubes) are prepared through facile molten-salt-assisted pyrolysis of B/N/Co precursors following chemical etching. The Co single atom is demonstrated to form a Co-N4 planar configuration by XAFS analysis. The developed B, N, Co/C nanotubes exhibit excellent oxygen reduction reaction (ORR) performance in alkaline medium. They not only display a positive half-wave potential (E1/2, 0.87 V), surpassing that of commercial Pt/C (0.84 V), but also show an outstanding stability (only 1 mV degrade can be observed after 10,000 cycles) and a high fuel selectivity. These excellent ORR performances derive from the efficient synergy of atomically dispersed Co active sites, unique 3D tubelike assembly structure, large specific surface area, and high graphitization degree. Moreover, the B, N, Co/C nanotubes assisted by RuO2 as an air cathode can enable rechargeable Zn-air batteries with larger power density (125.0 mW cm-2), higher specific capacity (746.8 mA h gZn-1), and better cycling stability than those of conventional Pt/C + RuO2-based Zn-air batteries.en_US
dc.relation.ispartofACS Applied Energy Materialsen_US
dc.rights© 2020 American Chemical Society. All rights reserved.en_US
dc.subjectEngineering::Chemical engineeringen_US
dc.titleAtomically dispersed CoN4/B, N-C nanotubes boost oxygen reduction in rechargeable Zn–air batteriesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.subject.keywordsB, N-Doped Carbon Nanotubesen_US
dc.subject.keywordsAtomically Dispersed Co Sitesen_US
dc.description.acknowledgementThis work was financially supported by the National Natural Science Foundation of China (51672193, 21875112, and 51920105004) and the Natural Science Foundation of Zhejiang Province (LQ18B030001). Z.R. thanks the China Scholarship Council (grant no. 201908440514) for the award of a fellowship.en_US
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